首页> 外文期刊>Journal of plant nutrition and soil science >Organic acids in root exudates from Picea abies seedlings influenced by mycorrhiza and aluminum
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Organic acids in root exudates from Picea abies seedlings influenced by mycorrhiza and aluminum

机译:菌根和铝对云南云杉幼苗根系分泌物中有机酸的影响

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摘要

Organic acid anions exuded from roots of Picea abies (Norway spruce) seedlings grown on glass beads in the presence and absence of mycorrhiza (Laccaria bicolor) and aluminum (Al) at pH 3.9 were measured. We wanted to test if the roots exuded more organic acid anions when exposed to Al and if mycorrhization influenced the exudation. Oxalate was exuded in far higher amounts than any other organic acid anion, with a maximum rate of 1.7 nmol (mg root DW)(-1) d(-1). Mycorrhizal roots exuded significantly more oxalate than nonmycorrhizal roots. The presence of Al did not enhance oxalate exudation. We conclude that the oxalate exuded constitutively by Picea abies/Laccaria bicolor may lead to rhizosphere oxalate concentrations that are relevant for Al resistance.
机译:测量在pH 3.9下是否存在菌根(双歧紫花苜蓿)和铝(Al)时,在玻璃珠上生长的云杉云杉(挪威云杉)幼苗的根中渗出的有机酸阴离子。我们想测试当铝暴露于根部时是否分泌更多的有机酸阴离子,以及菌根是否影响了渗出。草酸盐的渗出量远高于其他任何有机酸阴离子,最大比率为1.7 nmol(mg根DW)(-1)d(-1)。菌根比非菌根渗出的草酸盐明显更多。 Al的存在没有增强草酸盐的渗出。我们得出的结论是,由云杉/双色紫薇组成性地渗出的草酸盐可能导致与铝抗性相关的根际草酸盐浓度。

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